Homobenzylic Oxygenation Enabled by Dual Organic Photoredox and Cobalt Catalysis
作者:Joshua B. McManus、Jeremy D. Griffin、Alexander R. White、David A. Nicewicz
DOI:10.1021/jacs.0c04422
日期:2020.6.10
Activation of aliphatic C(sp3)-H bonds in the presence of more activatedbenzylicC(sp3)-H bonds is often a nontrivial, if not impossible task. Herein we show that leveraging the reactivity of benzylicC(sp3)-H bonds to achieve reactivity at the homobenzylic position can be accomplished using dual organic photoredox/cobalt catalysis. Through a two-part catalytic system, alkyl arenes undergo dehydrogenation
4,5-Dihydro-(1H)-pyrazole derivatives as cannabinoid CB1 receptor modulators
申请人:Lange H.M. Josephus
公开号:US20070142362A1
公开(公告)日:2007-06-21
This invention is directed to 4,5-dihydro-(1H)-pyrazole(pyrazoline) derivatives as cannabinoid CB
1
receptor modulators, to pharmaceutical compositions containing these compounds, to methods for the preparation of these compounds, methods for preparing novel intermediates useful for their synthesis, and methods for preparing compositions. The invention also relates to the uses of such compounds and compositions, particularly their use in administering them to patients to achieve a therapeutic effect in disorders in which CB
1
receptors are involved, or that can be treated via manipulation of those receptors.
The compounds have the general formula (I)
wherein the symbols have the meanings given in the specification.
The oxidation of gem-disilylalkanes, which can be derived from 1,1-disilylethene, alkyllithiums and alkyl halides, affords the corresponding ketones.
可以衍生自1,1-二甲硅烷基乙烯,烷基锂和卤代烷的宝石-二甲硅烷基烷烃的氧化得到相应的酮。
COMPOUND WITH AGITATION EFFECT ON PEROXISOME PROLIFERATOR-ACTIVATED RECEPTOR. PROCESS FOR ITS PREPARATION AND USE THEREOF
申请人:Jin Chunhua
公开号:US20110319458A1
公开(公告)日:2011-12-29
The present invention provides a novel compound of formula I, which has an agitation effect on the peroxisome proliferator-activated receptor subtype δ (PPARδ), to a pharmaceutical composition comprising the compound, to a process for preparation of the compound and to use of the compound in the manufacture of a medicament for treating or preventing a disease which could be treated or prevented by activating PPARδ thereof, said disease is one or more from the group comprising metabolic syndrome, obesity, dyslipidemia, pathoglycemia, insulin resistance, senile dementia and tumors. The present invention also relates to a new intermediate used in the preparation of the novel compound and a process for preparation of the intermediate.
A Novel Synthesis of Internal Alkenyldialkylborane by the Reaction of 1-Halo-1-alkenyldialkylborane with Grignard Reagent
作者:Akira Arase、Masayuki Hoshi、Yuzuru Masuda
DOI:10.1246/bcsj.57.209
日期:1984.1
To synthesize internal alkenyldialkylboranes, coupling reactions were carried out by using 1-halo-l-alkenyldialkylboranes and Grignardreagents. Hydrogen peroxide oxidation and protonolysis with acetic acid of the reaction product revealed that internal (E)-alkenyldialkylborane was formed in 60–90% yield.